(g) False; Polyester is a synthetic fibre. It is a synthetic fibre- artificially made Concept insight: Silk fibre is obtained from the cocoon of a silk moth. (a) True (b) False; The process of making yarn from fibres is called spinning. Silk fibres are obtained from the silkworms which spin the fibres to form a cocoon in the pupa stage. A lot of plastic pollutes our environment. Answer. (g) Polyester is a natural fibre. Answer: False. Question 3. (b) Silk fibres come from cocoons of silk moth. Weaving of yarn makes a piece of fabric. The process of removing seed from cotton is called ginning. Q. Rearing and selective breeding of sheep is done. Why? (C) False : Jute is obtained from jute plant (Corchorus). Q. Cocoons are kept under sun. Synthetic Fibre. 3. It is drawn by cocoon of silkworm.] State the following statement are true or false a) Yarn is made from fibres b) Spinning is a process of making fibres c) Jute is the outer covering of coconut d) The process of removing seed from cotton is called ginning. g) Polyester is a natural fibre. Answer: False. g) False, polyester is not a natural fibre. Jute is the outer covering of coconut. Answer: True. (d) True (e) True (f) False; Silk fibre is obtained from cocoon of the silk moth. State whether the following statemepts are true or false – Yarn is made from fibres. Answer: True. [ Polyester is synthetic fibre.] Question 2. Answer: True. SOLUTION: (A) True (B) False : Spinning is the process of making yarn from fibres. Wool, cotton, silk, jute. b) Spinning is a process of making fibres: - (False) c) Jute is the outer covering of coconut: - (False) d) The process of removing seed from cotton is called ginning: - (True) e) Weaving of yarn makes a piece of fabric: - (True) f) Silk fibre is obtained from the stem of a plant: - (False) g) Polyester is a natural fibre: - (False) Question 3: Silk fibre made of How silk is made from silkworm yak f) Silk fibre is obtained from the stem of a plant. g) Polyester is a natural fibre. Question 2. (True) f) Silk fibre is obtained from the stem of a plant. Question 3. Q. f) False, silk fibre is not obtained from the stem of a plant. d) The process of removing seeds from cotton is called ginning. 12. (d) silviculture Answer: (c) Sericulture is a practice of rearing silkworms for obtaining silk while silviculture is a practice of developing and caring forests Question 2: Which… (c) Wool yielding animals bear hair on their body. True or False : Question 1. (d) Hair trap a lot of air, which is a poor conductor of heat. Wool yielding animals have thick fur. Refuse (avoid) is the best way to manage plastic. The cocoons are collected and boiled in water to kill the silkworms. (D) True (E) True (F) False : Silk fibre is obtained from silkworm (animal). (a) Silk and Wool fibres are obtained from animals. (c) False; Jute fibre is obtained from the stem of jute plant. Differentiate between the larva stage and pupa stage in the life cycle of a silk moth. The cocoons are then unwrapped to get silk fibre, which is then woven into fabric. State whether the following statements are True or False. Answer: True. (F) Silk fibre is obtained from the stem of a plant. 3. Give reasons. If false, correct them. (False) Concept insight: Silk fibre is obtained from cocoon of a silk moth. Silk is obtained from the cocoon of silk worms. Paheli wanted to buy a gift made of animal fibre obtained without killing the animal. (g) Polyester is a natural fibre. Moth silk is not a type of silk. The silk worms feed on mulberry leaves and each worm spins a continuous thread, which is nearly 800 meters in length, to make a cocoon. [ Silk fibre is obtained from animals. (d) Mulberry silk, tassar silk, mooga silk and eri silk are different types of silk produced from cocoons of different types of silk moths. A natural fibre obtained by boiling of cocoons is called _____ Answer: Raincoat; Resin codes; polymer; plant fibre; silk; III. e) Weaving of yam makes a piece of fabric. Spinning is a process of making fibres. Fill in the blanks: Which of the following would be the right gift (a) Woollen shawl (b) Silk scarf (True) e) Weaving of yarn makes a piece of fabric. Nylon, polyster. Give reasons. e) Weaving of yarn makes a piece of fabric. NCERT Exemplar Problems Class 7 Science – Fibre to Fabric Question 1: The rearing of silkworms for obtaining silk is called (a) cocoon (b) silk (c) sericulture . (a) Silkworms are caterpillars of silk moth. 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